Willises
Doug isn't happy about the note, and the explicatives it contains. Adam tries to point out that they are just kids, but Doug asks him if he can be certain that nothing happened the two nights Todd stayed in Cody's room. Adam admits he can't. As Pam wonders why Cody no longer confides in her about things, Cody arrives back home. Realising what her parents think, she plays along with the idea, without giving anything else away. She heads to bed leaving her parents more confused than ever.

Robinsons
Melissa asks Cody if she doesn't feel just a bit guilty about her parents, but she claims she isn't. Todd suggests they all stay in and watch a film that night, but Melissa points out that Josh promised to take her out tonight as an apology for last week. Josh claims that he's broke, but when she reminds him of Justin setting up dancing lessons at school, he admits he'll take her.

Number 30
Dorothy has just got off the phone to a museum who are willing to take a look at the old bone that she found, which makes her very happy. Ryan is less impressed, and Dorothy soon picks up on the fact he isn't doing his homework, and sets to work creating a study plan for him.

Willises
Adam arrives back to find Cody and Todd romping around on the sofa. He warns them that their parents probably won't let them go to the dance lessons, because of the note. Cody admits it was a set up and nothing was meant by it. Doug arrives back as Adam leaves and tells them to stop mucking around as there are 'other things in life'. He points out that he's not forever kissing her mum and Cody begins to get the point.

Number 30
Dot is still busy trying to organise a study plan for Ryan. Ryan points out that he'd rather give up maths and take another language as it'd help him in the police force.

Willises
Everyone is back at home, while Pam is busy cooking dinner. She is about to serve dinner, but it turns out not to be ready and sets the time back. Doug points out it may be a good time to talk the birds and the bees with Cody. She suggests he go talk to Jim too about Todd. As Pam tries to bring up the subject with Cody, Cody twigs that it's about sex and begins teasing her mum about it. Pam tries telling her to embrace her youth as she's only got one chance, but Cody decides she's got to wash her hair before she goes over to Todd's later that evening, as they only cover the theory not the practical side of sex at school!

Drive In Movie
Melissa isn't impressed that Josh has brought her to a drive in movie. She points out that they need a car to get it, but he takes her around to the back and encourages her to climb a tree.

Robinsons
Doug is over to talk with Jim, but as he's not there he decides to talk with Todd directly. Todd asks him to tell Cody about the sex videos he's got in for that night. Doug points out that many girls are taken advantage of and he doesn't want that of Cody. Todd points out that Cody is a strong girl and everything they do they do in agreement. Doug isn't so impressed and leaves.

Movie Tree house
Melissa isn't feeling overly safe up in the tree house while Josh is busy enjoying the film and tucking into some popcorn. Melissa asks if they can go home, but Josh wants to see it out to the end.

Number 30
Dot is still forcing Ryan to study, and comes through with a book from when she was about uni, explaining study tips. He asks for a break as the book suggests, but she tells him he can after another hour. Ryan isn't impressed.

Willises
As Pam and Doug compare their failed stories with the birds and the bees, Adam comes over and explains how he was on the maternity ward last week where he saw a birth. He mentions that the mother was only Cody's age, which triggers Doug to get up and storm out, on a mission to find them both.

Movie Tree house
It's the end of the film and Josh decides they best climb down the tree before they get caught, but Melissa is to scared of climbing down in the dark and refuses to move.

Willises
Doug arrives back with the two youngsters. They all sit down around the table and Doug brings up the conversation. After and awkward moment he tries to explain the facts.

DOUG: But sex is..
CODY: My biology homework!

They all burst into laughter, and Cody admits that they never let her and Todd have any privacy, so they decided to teach them a lesson. Cody explains that everything in the notes related to their biology lessons. Doug maintains that he was cool and collected throughout the whole thing, but the others aren't so sure. Todd offers to lend him the note once he's done with it.

Number 30
Dot comes through to find Ryan still busy working. He explains that he can't follow the plan as he's got too much work to do and too little time. she tells him that's not how it works and he should leave it for the night and start again at 8.30 tomorrow morning as the plan tells him to.

Movie Tree house
Melissa is holding onto the tree, totally scared about coming down. Josh tells her they have to get down or they'll miss the bus home, but it's clear she isn't going to move. Josh decides to try another method, but ends up slipping and falling out of the tree. Melissa isn't able to see him through the darkness.